Vertical rotary glazing machine



Patented ct. 5, 1926.

DANA

Y "iaAssAcHUsETTsl MASSACHUSETTS, Y.A CORPORATION' OF VERTICAL ROTARYGLAZING MACHINE.

Il i Application filed August 8, 1925. Serial No'. 48,947.

yMy present invention relates to the manufacture of leather from skinsand hides, and more particularly to an improved machine for performingthe operation known as glazing.

In performing the operation of glazing on leather as one of thefinishing processes thereof, it has been the universal practice toemploy a machine known as a glazing jack and which machine carries acylindrical block of glass, agate, porcelain `or the like held in an armwhich is reeipi'ocated by power.' The reciprocatory motion of the armhas been considered necessary in order to obtain a structure in whichthe desired pressure may be imparted to the glazing roll as it is drawnover the leather, the structure of the machine being such that theglazing roll is given a foursided orrectangib lar motion. rI`heglazing'arm reciprocates at high speed and it has been impossible todevise a machine of this character in which excessive vibration will notbe set up, both to the machine and to the building in which the same islocated. Buildings in whichthe batteries of glazing machines are locatedmust be periodically7 shored up and strengthened in order to withstandthe vibrations Qcaiised by these machines. In addition,'such machinesare exceedingly dangerous as the head carrying the glazing roll. isrelatively heavy and being shot forward with great rapidity, causesserious damage toV a workman ory other person who accidentally comingwithin theirreach.l As the workman must Y sit in proximity to the anvilon which the leather is being held, and therefore inV proximity to thereciprocating glazing head, the danger of accidents is'always imminentand a number of painful and serious accidents occur in every glazingplanttliroughout the country. f Various attempts have been'made to coveror shield theV glazing head so as to.

.prevent a workmanv accidentally coming within range thereof, but, dueto the nature of the o1 3eration.'thesev attempts have not beensuccessful. No progress so far as I vam aware' has 'been made insuccessfully eliminating the vibration of these machines nor Ytheeffects of suchvibrations on buildings.

In my present invention I'have obviated the defects in priorconstructions and have devised a glazing jackor machine in which arotary motion is impartedv to the glazing roll, thereby eliminating thevibration and,

a safety shield may be associated to thereby eliminate accidents and,further, have devised a machine in which the leather being operated onneed no longer be held by the y n. HARDING, or ARLINGTON, MASSACHUSETTS,Assieivon; To HARDING interi-- y ivnnniive COMPANY, or EAST Bestron,

further, have producedva device with which `y operator as this featurein prior machines ff.

was a prolific source of accidents.

In carrying out my inventionI have provided an arcuate anvil over whichsuccessively move glazing rolls equally spaced about the periphery of awheel. or `disc y mounted for rotation on a horizontal axis.

Associated with the anvil and controlled by.

the rotating axis of the disc is a leather gripping device whichoperates automatically to intermittently hold and release the leather y,

being worked upon.

The principal object of my invention, therefore, is an improved glazingmachine.

Another object of my invention is an im-` proved glazing machine of therotary type. y

A further object of vmy invention is an improved leather holding Vdevicefor glazing machines.

Other objects and novel features of the constructionand arrangement o fparts comprising my invention Will appear as the description. of theinvention progresses.

In the accompanying drawings illustratying thepreferred embodiment of myinvention, I

Fig. 1 is a side elevation; K Fig. 2 is a. rear elevation, and

Fig. 3 is a sectional elevation on the line" 3-3 of Fig. 1.

Referring to the drawings', 10 designates ,a base at one end of which issecured a pair of pedestal members 11, such members being spaced apartfrom each other and extending upwardly and forwardly to any suitableheight or point. Formed on the top ends of the pedestal members 11 andin alignment with each other are bearings .12 in which is rotatablymounted a shaft 13. This shaft 13 extends laterally outward from one ofthe pedestals 11 and is provided on such laterally extending end withtight and loose pulleys 14 and 15 respectively, a collar 16 secured tothe end of the shaft 13 preventing longitudinal movement of such pulleys14rand 15 on the shaft. Between the pedestals 11 and secured to theshaft 13 is a wheel or disc 17, this wheel or disc consisting primarilyof a hub portion 18 having formed integral therewith and extendingradially outward therefrom the equally spaced arms 19. At the extremityof each of the arms is provided a split holding device 2O and in each ofthe split holding devices is secured, in any suitable manner, acylindrical glazing block 21 of glass, agate, or any other suitablematerial. The eXtremities ofthe arms 19 are connected together bymembers 22 constituting, in reality, the periphery or rim of the Wheelor disc 17. Secured to the shaft 13Y adjacent to the pedestal 11 remotefrom the tight and loose pulleys 14 and 15 respectively is a disc 24provided wi'th a plurality of cam faces 25 on the periphery thereof.These` cam faces are equal in number to the number of glazing blocks 21on the rotatable member 17 and the position of the cam faces 25 andblocks 21 bear a. certain relation to each other that will be pointedout hereinafter.

Secured to the base 10 and spaced Yapart from each other are pedestals26 and 27. The pedestal 28 is greater invheight than the pedestal 27,and connecting' the two pedestals from a point adjacent to their topends is an arcuate plate or member 28. The upper surface of the arcuatemember 28 is on a radius that has the drive shaft 13 as a center. Themember 28 is `substantially T- shaped in cross section, as may be seenfrom an inspection of Fig. 3, 1and threaded through the top portion ofthe T at intervals along each edge thereof are thumb screws 29. Mountedon the top surface of the member 28 and resting on the upper ends of thethumb screws 29 is an anvil comprised of an arcuate shaped steel plate30 on which is secured an arcuate rubber buffer 31, and secured to theupper surface of the butler 31 is an arcuate anvil face 32, preferablyof cast iron, although any other suitable material may beemployed.Cementedto the upper and Yarcuate surface of the anvil 32 is a leatherfacing 33 and on which may rest the sheet of leather 34, the grain sideof which is to be glazed. The endsv of the pedestals 26 and 27 whichextend upward beyond the arcuate' member 28 form abutments which limitany possible movement of the anvil on the arcuate member 28. Secured tothe sides of the pedestal 26 and also secured to the sides of thepedestals 11 and extending upwardly therefrom are braces 35 and 33respectively, such braces having their upper ends terminating adjacentto the upper surface of the anvil 32. Secured to the upper ends of thesebraces 35 'and 36 on each side of the apparatus are table members 37which, as may be seen from an inspection of Fig. 3, form a support onwhich the sheet of leather 34 is maintained horizontal.

On the forward face of the pedestal 26 is a member 38 and in this memberis pivotally mounted, intermediate its ends, a clamping lever 39. rlheupper portion of this clamping lever terminates in a curved end 40 thatengages with the rounded face of the upper end of the pedestal 26.Between the pivot point 38 and the rounded end 4() and lying between thelever 39 and the pedestal 26 is a coil spring 41 which tends to forcethe curved end 40 out of engagement with the rounded upper end of thepedestal 2G. Pivotally attached to the lower end of the lever 39 andextending rearwardly above and substantially parallel to the base 10 isa connecting rod 42. rlhis connecting rod is prvotally attached to theend of one arm of a bell crank lever 43 that is rotatably mounted on ashaft 44 secured to one of the pedestals 11. The end of the other armofv the bell crank lever 43 is pivotally 'attached to the lower end ofan operating rod 45, this rod extending upwardly through a guide'- way46 secured to one of the pedestals 1l and is provided at its upper endwith a rotatably mounted roller 47 adapted to engage with the cam faces25 on the cam disc 24.

Also attached to the end of the other arm of the bell crank lever 43 isone end of a coil spring 48, the other end of this coil spring beingattached to a pin 49 secured to one of the pedestals 11.

The spring 48 tends to force the operating rod 45 upwardly and, tomaintain the same in engagement with the cam faces 25 and the cam disc24 and, also, through the bell crank lever 43 and connecting rod 45,rotates the lever 39 about its pivot point and moving the rounded end 40,of such lever 39 away from the front face of the pedestal 26. vVhen thevarious cams 25 come into engage ment with the roller 47, the operatingrod 45 is moved downwardly and, through the connections above described,causes the Yrounded end 40 of the lever 39 to engage with the upperrounded end of the pedestal 28 and if, under these circumstances, a hideor skin 34 is in position on the apparatus, such hide or skin will beheld firmly against movement. rlhe relation of the cams 25 withrespectto the glazing blocks 21 is such that a clamping action by the curvedend 40 on the hide or skin 34 takes place during the time that theblocks `21 are in engagement with the leather facing 33 on the anvil,and when such blocks 21'are no longer in engagement with such leatherfacing 33, the cams 25 will have moved past the roller 47, allowing suchroller by means of the spring 48 to move .into engagement `with the camdisc 29 and thus yfreeing' the leather 34 from engagementby the curvedend 40 of the lever 39. The time between the release of the lever 34 andthe next consecutive gripping of such leather will be sufficient toallow the operator of the apparatus to move they leather 34 to anyposition ldesired on the anvil and bring a new surface into position tobe operated on by the glazing block 2l.

By means of the thumb screws 29, the degree of pressure of the glazingblocks 2l on the leather 34 may be regulated. The member 17, beingsubstantially circular', and the anvil on which the blocks are carriedby such member '17 being also circular, the vibratory movement of priordevices is entirely eliminated. My present apparatus is capable ofhaving the glazing blocks 21 move at a much higher surface speed than ispossible in a reciprocating apparatus. Further, the workman is relievedof all necessity of holding onto the leather 34 during the glazingoperatin and can lthus keep working at top speed for a longer timethanis'possible with other machines and with much less' fatigue. Beingless fatigued, he is more alert and the liability to accidents from atired operator is eliminated.

While I have necessarily shown and described the preferred embodiment ofmy invention somewhat in detail, it is to be understood that I may varythe size, shape, and ar-v rangement of parts comprising my improved`apparatus within wide limits without departing from the spirit of theinvention.

I-Iaving thus described my invention, what I claim as new is:

l. An improved glazing jack, comprising an anvil, means for holding ahide or skin thereon, a plurality of glazing blocks adapted to move oversaid anvil and in engagement with the hide successively, and

means associated with the glazing blocks for controlling the holdingmeans. l

2. An improved glazing jack, comprising an anvil, means for holding ahide or skin thereon, a plurality of glazing blocks adapted to move oversaid anvil and in engagement with the hide successively, and meansassociated with the glazing blocks for maintaining the holding means inengagement with thehide only during the time the l glazing blocks are inengagement with the hide.

thereon, a cylindrical member associated with said anvil, a plurality ofglazing blocks mounted on the periphery of saidk cylindrical member andadapted to move over said anvil successively and in engagement with thehide, and means associated with the gl azing blocks for lmaintaining theholding means in engagement with the hide only during the time theglazing blocks are in engagement with the hide.

In testimony whereof, I have signed my name to this specification.

DANA E. I-IARDING.

